The dynamics of dust injected into ISM during supernovae explosions

Details The dynamics of dust injected into ISM during supernovae explosions The dynamics of dust injected into ISM during supernovae explosions

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja.....7593m&link_type=abstract

EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #7593

Physics

Scientific paper

Combined visual and infrared observations of supernovae provide direct evidence for the condensation of fine dust in the rapidly expanding shells. While the gaseous shells are eventually decelerated and brought to rest by interaction with the ambient interstellar medium, the condensed dust is injected into this medium with large initial speeds. While the frictional interaction of these high speed dust grains leads to their deceleration, they simultaneously lose mass due to sputtering while they initially charge up due to secondary electron emission by ion impact. Here we follow the dynamical evolution of such grains by solving the simultaneous equations for conservation of charge, mass momentum and energy. The large residence times of these grains and the associated large travel distances suggest that they could be a source of heavy ions far from the central explosion.

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